Defending champion Jo-Wilfried Tsonga came from behind Friday and earned a semifinal berth at the $608,500 Thailand Open. Tsonga, who is the tournament's No. 1 seed, got past qualifier Marco Chiudinelli 6-7 (9-7), 6-3, 6-4 in their quarterfinal match.

Russian Mikhail Youzhny and German Andreas Beck were first-round winners Sunday in the Allianz Suisse Open in Gstaad, Switzerland. Youzhny eliminated Gaston Gaudio of Argentina 6-3, 5-7, 6-4 and Beck scored a 4-6, 7-6 (9-7), 6-4 win over Marco Chiudinelli of Switzerland. No other matches were scheduled